Implement Amazon In App observer

Samples are under SDK named SampleIAPConsumablesApp.
The key part is AppPurchasingObserver.java

Prepare Receipt Verification Server

Observer returns Amazon In App Receipt.
You should verify this receipt to send to verification server.
In real app, Amazon prepares verification server.
For testing, you need to prepare your own server.
Amazon prepares Java Server application for it(RVSSandbox.war).
You can prepare Tomcat or other AP server and server for it and can test it.

What is receipt? It’s just json

Real

You need to register amazon developer account

Tips

Restore is required? : Not needed, but should be prepared for users
Google Play Account? : No kindle need Amazon User Account, not Google Play
Works with Single Binary both Google Play and Amazon? : Yes, but be careful